Gold and Base Metals Associated with Uranium Mineralization in Some Lower Carboniferous Rock Units in the Wadi Abu El Mogheirat Area, Southwestern Sinai, Egypt
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Gold and Base Metals Associated with Uranium Mineralization in Some Lower Carboniferous Rock Units in the Wadi Abu El Mogheirat Area, Southwestern Sinai, Egypt
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The authors acknowledge the support of the IMHOTEP project MetalValor (funded by the French Government though the Institut Fran?ais d’Egypte and by the Egyptian Academy of Scientific Research). The authors also acknowledge the support of the Nuclear Materials Authority (NMA), Cairo, Egypt, for the generous use of their field and laboratory facilities during the preparation of this work.

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    The Lower Carboniferous sediments at Wadi Abu El Mogheirat consist of four stratigraphic formations, from base upwards: Um Bogma, El Hashash, Magharet El Maiah and Abu Zarab formations. The most-concentrated radioactive anomalies at Wadi Abu El Mogheirat are in the middle member of the Um Bogma Formation. The gibbsitic marl in this formation shows the highest uranium contents (around 710 ppm). Gibbsitic marl and black gibbsite of the middle Um Bogma Formation show higher enrichment in Co, Cu, Mn, Ni, Pb, Zn, U, V, Ce and Th. Black gibbsite contains the highest total rare earth elements concentration, especially in terms of LREEs, while gibbsitic marl contains the highest content of HREEs. Anomalous contents of gold at Wadi Abu El Mogheirat are recorded for the first time in the gibbsitic marl (content: 10.4 ppm), black gibbsite (2.8 ppm) of the middle member of the Um Bogma Formation and in the siltstones of the El Hashash Formation (0.6 ppm). Gibbsitic marl shows the presence of uranothorite, celestite, zircon, atacamite, barite, xenotime and rutile. These characteristic demonstrate that the middle member of the Um Bogma Formation constitutes a potential source for gold. This conclusion is reinforced by the potential to exploit other metals such as Co, Cu, Mn, Ni, Pb, Zn, U, V, Th and Ce as by-products.

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Osama R. SALLAM, Abdalla S. ALSHAMI, Abd Elhadi A. ABBAS, E. GUIBAL.2021. Gold and Base Metals Associated with Uranium Mineralization in Some Lower Carboniferous Rock Units in the Wadi Abu El Mogheirat Area, Southwestern Sinai, Egypt[J]. ACTA GEOLOGICA SINICA(English edition),95(6):2087~2099

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  • 收稿日期:2019-11-28
  • 最后修改日期:2020-04-14
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  • 在线发布日期: 2021-12-27
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